Which ball based mods for UT2k4 do you know - besides CarBall and Deathball?

Back in the days we used to play a mod / a map at our LAN parties and I've been racking my brains all day but I can't remember the name.
The map takes place in a dark cavern / cave system where you have to take a ball from the middle of the map to a certain point on the opposite side (opposing area).

When I’ve tried to remember something like “The Ball” crossed my mind.
But I think my memory played a trick on me regarding this, because there’s no mod for UT2004 like “The Ball” for UT3, right?

Which mod may have been that or perhaps it was a custom map for bombing run which matches this description?